[3] Rowlerson was consistently critical of the formation of rival unions in the tailoring industry, many of which organised Jewish workers.
In 1915, he tried, unsuccessfully, to persuade the General Federation of Trade Unions to get various small affiliates to become branches of the ASTT rather than form the United Garment Workers' Trade Union (UGWTU).
He was sometimes critical of Jewish people in general, claiming that Jewish branch secretaries in the ASTT were inefficient and mismanaged finances.
However, by the 1920s, he moderated his positions and tried to encourage Jewish workers to join the ASTT.
He retired in 1937, although he continued to serve as the union's representative on the Retail Bespoke Tailoring Trade Board.